{"instruction": "You are an expert in named entity recognition. Please extract entities that match the schema definition from the input. Return an empty list if the entity type does not exist. Please respond in the format of a JSON string.", "schema": ["GENE"], "input": "The difficulties to analyse prostaglandins ( PG ) by gas - liquid chromatography are mainly due to the lack of sensitivity of the gas - chromatograph itself ( higher than 200 ng ) and to the poor resolution of the packed columns ."}
{"GENE": []}